No-voltage release switch



Jan. 9, 1923. 1,441,796.

8. E. GETCHELL.

no VOLTAGE RELEASE swncu.

HLED MN. l8 I922.

sssssssssssssss I.

INVENTOR Bery'a'mfn 17. Get abell,

TTORNEYS.

B. E. GETCHELL.

N0 VOLTAGE RELEASE SWITCH.

mm m4. [8. 1922.

2 SHLETS--SHEET 2.

INVENTOR .BelJ'alnin E. Getcjzell,

ATTORNEYS Patented Jan. 9, 1923.

s ut-Es PATENT oii 'F-iicsi BENJAMIN E. GETQHELL IOF rmInvILLE, CONNECTICUT, AssIGNo'n To 'IJIE mnnm BUIE"ELEGT EIG MANUFACTURING COMPANY, OF PLAINVILLE, QQN'NECTICUT, A

"= (10' sronii'non on oominc'rlon'r.

v NO'VOLT-AGE RELEASE SWITCH.

sppliciition'lflledlanuury 1B, 1922. Serial No. 530,053.'

To' n it: known thet-L-JBENJAMINQ "G a 01mm a zenmf; the; United States of America, i mesidingnatiPlainville, Connecti- 5 cut, ,he'sej invented ne-newmand -.li fui N (Mywinvention' relatesato an Ielcctrio switch;

endqpanticulcnly to ithept'y w known asa. no-

1 0 vdltage releese. switch; wherein! :the {switch isglutom ticelly :openedflipon a total failure w: agpredeterminedvpoint.-' 2-2. c r

8'.-a9:;0bjedt;ofmyinvention to provide 1 novel-means ionholdin'g en eleptric switch in!v closedcircuit position under' normal voltsgemonditions 111-. the circuit end-$01 open- 5:; ing the switch-upon aj total or pert-i111 failurenfimoltege in-the:oircuit.- wbeuothehjph'ect of myr-invention is to Fpi'b vi deisneo'hiinicalimeens: for adjustment of themeaeing meensindependent-of-the coil. 0 :5 .Anothen-qbjectgis to provide electro-magnetic means for holding the'switch in closed position without the use of;;.-springs or "\i; ii) n" 1-" f I iiMyninvention ;in ,its preferred form ini cludesmnyeuitsble type ofqelectr'icswitch, including; fixed'and movable contacts; The oneor more-movable contacts maiv be actuated in the :11Sua1 or any desired manner. An, electro-maigneticcore and-:o0ilis proj vided, and an iarmature :is preferably pivoted adjacent thereto and coacts therewith. s5 Ansuitableconnecfion is provided between the armature sand. the switch operating means so, thet; when; the SWitGha-iS, closed and i- 5 smlong as thewoltage; =not'ma1,:the I armaure: ,willb'e :held: to. the; core and the switch 40 will-,bo held 51212010866. circuit ;positipn. If for ally reason :the oltage; in "the circuit should totally fail or be -r educed belowa zpredermined. oint, =the forceattreoting the signature; en core (will-be lessened, and 46 suiteblejmesns sqch-as a. spring will.then thlfOfl hQi$WitGh ,to open circuit position or theswitchmey. lie-opened by hand ifso-de- :sired, without first breaking the circuitof the coil. o Lhayexchosen to disclose =an illustratfize mbodimentof ID; invention in connection with a commercia typeiof motor starting closed motor starting switch and embodj-.

lug-features.ohmy inventionp vl'. W11:

Fig. Zis irviewliiertlyiinsection iind disclosing ."peitsof the 'no-volte'ge -rele'ase mechanism; ':the :s witch peftsr-being: diagrammatically showniin"the-motonstartiiig POSifiOiL1' 2 I -.:if.

- Fig. 3 is a viewsimilhr'to-Figs 2,'1butdisclosing the switchfiin the fiill closed or moths running position. H; raw m Fig. 4 is a perspective view of a,"-ieInr.w-' eble coil used -in connection with my invention. .15 2- i 5" Fig.5 is e'perspectivefwiiewof an armsu ture forming-e. art of my invention.

--.In the illustrative embodiment ashovimg )6 indicates e switch box of: any desired onap: provedizform; -Within ithez-box :are' located fixed contacts "I7 which are connectediwitli the fuses shown; indicaltezfixed con}.- tacts which are connected tethe-motor cixw cuitand are.notaccnnectedmith the fuses.

Movable contacts such as blades 9- 9 -z afe pivoted inthe switch box andrinntheir -veri= disclosure to the-operating cilllikrqlfl endconstantlynrges the-crank: in a direction-to throw the switclLto the =open-ci1'cuitposition; Means are provided forjholding ithe switch-blades in; the olosed circuit position under normal voltage; conditions-end permitting-theaswitch to'be openedupon .e pertial or total ffeilure .Of :currentdIn the pres preferably ,U-shapedimfiorm, .15 secured ent disclosure .en! elentrosmegneticicor :12

' strips sedfiredr side plates 13. An armature M ii; [ilvntiz l adjacent .the core and is ndapted to conct therewith fdi holding the switch closed nu der normal voltage conditions. The ul'mn- 5 tupe is pi' etfemhiy lan i mtedi and ole-jean m p; ,ri gi s may he pleade ii dslhe d l n t i pi'efs'nt diselosui' the ill mature is pivoted at 16 to the side plotcs 13 coil 17, the opening, in the coil being neferably shaped to correspond .i-vith'the s ape.- of the core and is removabl v held thereon. In the form shown, I hen-e disclosed n sim lessringhclipvw-which may be used 15 if; esire -to, CtillSbtllgkCOil tomorefirmly rip the leg ofnithe-'coi'e":tofpi'eventzriecci eilta'lelisengugementu uThe coil-is connected in-ibhernimuitlon-the load 'side o'fzthe switch so-ithat nthenz-theswitchds open 110 curi'ent willlbemons'umed-ibwtheeoil. 'It-isiobvious that with removable coils, such as Lhitve diselosed,fitgis' possible 'tozeasily and quiclily substituteimzcdil lofmigrea'te'r for lessernumher of turns to vary the forcei'ertedmfizthe armature. go v -I- -:-In-.the pmsentwdisolosure; nlinli' 2U pivotally connects the armature 1-1 and theoperating crank 10,-, -i;()ne-of -these e1ements,prefemblvlithelzlinli 20,- is made -zadjustable in so lengthitoasuitmiiying-conditidns inc]-to permit:aaslightmd-jnstment-of the point at which theteledtror-magiietwill Terese; the'ai'm nture. Thedink -20nis refrnhly' inside 'up of we gether by 'slottecl conned 25 tiohswandscrws'21-21.'*- 4 The switch imayrbezopemtedbyith handle em-we outside of the borand connected othe operating crank IO. F or the type i of m'otorstaitin switch disclosed, the con'nee- 40 tion'betweenlt e handle 22- and crank '10 may be ofi-:thei-iorm.-sho1i1n"in petent sto Ahlst-rom iii- 23112290! Knudsen-#1 $64 ,384. which referehee is made 0% 'a fuller "disclosure.

Witha i'onnection is shown in the above 46 patents theha'ndl'e'iQQ maybe moved initially only -'farendu'gh to-"oonnee t' 'the blades -9'9 wlthothl'rontgctd M8 asjshown in fFigs 1 and "2. --I his is the-motor stdrtingposition 50 switbfuund eonne'ct' the hledes tw-thecom tacts 7-7 as diagrammetically'showniii-Fig. 3Hthe handle n1u'st be drawn *liaek slightly after Whihfiit may"be: aga'in pushed-for w trdljfl' taihio'vetlie'blades to the contacts lllhgs'o erdtiorl is hy'fo llowsfi ks'suniihg the sw'ite itu'be in'o'pn circuit pdsitionwnd it-is ldsired 'to'blo'se-the sahm, therha'ndle is 00 en ggthef fixd-'oontdetsfi: This is "the" ni t' startihg position' of thejswitm; "When: tfie'motor has mtgtgi'ined theme 15% s ed, the handle is itrrther act uetel to? isco'miec't' the i=5 brides-wine mime @which ih turmoillong as the voltitge' rema luck the current through the fuse; during the operation ,of. the motor, Ail/hen the switch is closed, the spri'ng ll will beilnder stress and the armature will be in contact with the com os diselosedin l igi 3 l sweet the win-4e hea e we-weenm mul force and the spring is not able to overon thtsyforce so as to open the switch. Should the currentin the coil circuit, however,entirelynfailion inll below a predetermined point, the force holding the armature is lessened and thespring-inm'ietlizitel'ydtitwe the armature away iron; the Co'te'fi'nd'ofie ns the switch with 'a -snep ahtiolii- It will: be-seen that i various afclj ustmefits are possible so;es"to cause-the-switoh'to opened upon 5 various 'diifei-ent'd ropg ifilthi voltu -e. For exa-mp1e;-'if- 'the link 20 M" lengthened' '(-1'vith the rbporti'dfisyShdtifi) the spring-will pull' w-i hfe gleaber lever- 'e and therefore the armht'ure wqu-lfl be'wi drawn u'pon' a mn'eillei'fidrop iiithh 'idlt' e? Qonvei'sely',=u shoi'tenii'ig'bf the li'nlc'fiil t'with' the. proportions shown "11V hlihif' kEQi-iiSEf 'the' spring to pull 'w-ithi:l'fl6 S"afl\f8JitagGOllS" leverage and permit thelstvi'tch 'to sta' closed during a; greater drop in voltu ewQb vionsly' the' point; set: which the; a seating; crank is pivoted and: theig poisitiow of the crank will liliewise' inflifeneejthe/ 'oi-htww which the switch opens indth ad] ofthe spring is also afqctori 'fioilgi fi'f vafiy ing numbers of mmsimuynbqr interchan e ably placed on the cob-eenfi-"adjnlstrr'ient-rof the point at which tl1e hoitcl1 opens= 1 nky be thus obtained-+ While I have describedone specifle hzh' bodiment of my-inventi'onm'ndhdve disclosed the same ineonneetion with a eomtnerbia lj t {3a ofmotor stalr'tings titehy 1- v'vish it' 'iin erstood that many iehan ges wmny' he madewithin the scope of' the appended claims, and that-the invention may be used in' connection Ill) k an able contacts me ans saidaboxlan-elect'roenagnet having a pivoted :a link permanently connecting said a'rmatnre and said operating crankf said i electro-ma et= serving to hold said switch ,bleids *inc osed circuit position under;;.normal vbltiige 3 conditions, and a spring=or=separating the armature from the;

-'the Switch com-.iofithe magnet andopem predeuponza-freduction'of ,ivoltage: be ow a termined pbintscr, Mil w;

"3min inn: electricnswitch fixed':-and -inov.-. Lion operating the lat:

' tor :an 2 elbtro-magnetic' core ,2 a: coil Ethereon,

describe bias mature darting. to;

. armarmatnre pivoted adj acent isaid ico're, a

link permanently connecting's aid armature anddsaidlicontacti'o eratingemeans; said. Jaroldlthe movable :contact.-; in'iclosedztcirbuit position :undeninorrn'al Welt-: ,-conditions in the xcoilg-and a=spring.-con-w nectedzqtoione oitthe monablerparts forthrow i irigzthe iHdOVflbIG-CdIl-tfifititfl: opcxi-circuitposi- 2' tion- '51'118. rbdiictioriiof yeltagei'vin thezclrcuit. own: predeterniinedipoint; v

-=.-1=-. *Iimanielec'ztric swatchnfixed iandm'ovablm contacts,-aneans tier hnotingithe inov able; contact; velect'ro niagnhtici a means 1 including. i an a'rmat n'e,=.-a flinlrqconnecting 'said zerma'ture the: said] moyabl'e fc'ontact ophr-atingsmeansy alspi'ing' ipri niovling' said movable-contactto 3 open oirquitlpos'ition withiii/snap action-(upon:- azdailu'miozfe voltage in thezdircnitwsaid lin'k beingiad'nstable. in ,a'len'gth (for ithe purpose ana .ein.-enc1osd'-Jswitcli, element-sex s fixed. contact thereimaipivoted switch blade inrsaid box: for coaction: with said fixed-,c'on- 5' met l-air Sperafin'gnrank for. the switchblade,

ante

ectro zna eticecoi-e and coilImounted said :bex, a LPIVOtBdr'. armature tor E coaction with said core,:nneans permanently connect:

ing said-crankmnd armature; said; armatureservingntowhold-isaid switch gbljade: inclosed;

circni't-position .und'er Tnorinal voltageicondl tionsJand aspring connected ,to one. of'said movable :parts ifor. throwing, the 5 switchblade to open-circuit position; upon a! :reduction bf voltage in the circuit below a predeterminedpoint-3151i i'l? i l-i i 11,1. 1 55-.

6. In an enclosed switc a switch box, stationary contacts therein, pivoted switch blades for cooperation with said stationary contacts, a crank journaled in said box having operable connection with said switch blades, a spring connected with said crank adapted to throw the switch to Ofi position and pivoted link means cooperating with said spring and said crank whereby, the spring is fully tensioned when the switch is in On position and whereby the switch openin power of said spring is reduced when the switch is in said On position.

7. In an enclosed switch, a switchjfbox having stationary contacts mounted therein, a switch blade for cooperation with said stationary contacts, a crank within said box havingoperable connection with saidswitch blade; a spring connected with. said, crank adapted to throw-the switch in Oil position, said spring being connected with at one sideiand a =link-sneans connected withi the crank at the opposite side, said link means constitutingi a means whereby -;the spring; is iully'tensioned when the switch .is inthe On positionawith the-switchdzhrowifl Jewel of saidisp'iiing niodifiednwhenwswitc a icin -said, OHPOSifiOfl?/ L's ni e. s [ii .5

-8 I n an' renclosed sw itch,a stationary contacts mounted therein, :pivotod switch bladesLion\GPOperatiQn-Witmsaid'stak tionary contacts; a crankiwithin|the box-,,hay mgr;operablehconnectionnmithisaida'switch h1ades,-,u'- 4s 'izirig:.conhaetedWithtsaid-icrank-1 andfadapte' ltdrthrowltherswitch. ton-.Oiippfii tions.admkpivoted-withinithe b'oxi anaconda; link connectedsw'itlrsaid: icrank and 1a. third! linkconnecting saidqfirstnandcsedond 51 19 1 tionedilinks irthen 'idspr'zingrheingnafiapted, to. he fully tensidnedr iwhen bhmSEitbhnlSrin 1 On -u positiomwndnfisaid linkdsiconstitutingi meansfwhereby the switchgopening nowenofii said snrinofiisirdnced'mhen ,thei ewi tch; is yin;v thee-fully -P i, m1 !1 'iln-i'h: 511i; l 'iw'an H9: In angsenclosed switchfi agcasingp sta the acrank 'ai switch-choir, 7

tionary contacts mounted within said casing;

is 1m and said :link'ssbeing adapt'z ed .to: two; thesswitchqopenin'gpoiwer on said spring iwhen-theiswitch join-the Qmpc-r SitiOIL -1--: mail L-i'l-a. .211: m -'='-"-=n' fi :05. 5!- -10.- In an enclosed zswitch,.--'arswitch box. stationary contacts mounted therein-.jrpivqted 1 switch bladesziorrcooperation:withwaid .stationary; contacts; La craninijeurnaled :in i said box andwhav' IQPBIB-blB-Lii-{OODIIGCQOIIHWith said switch bla es, a spring connected with said crank adapted to move the switch to OK position, a link pivoted within said box, a second link connected with said crank, a third link connectin said first and second mentioned links and a stop to limit the movement "of said links, the said spring be ing adapted to pull approximately against the pivotal centers of said first and second mentioned links and to be fully tensiond when the switch is in On position.

1L In an enclosed switch, a switch casing, a switch within said casing including appurtenant stationary contacts and pivoted switch blades, a crank pivoted in operable en gement with said switch blades, a spring connected with said crank 

